Home / 14,287.70-21,431.55-12,878.30

Finding the Fourth Proportional to 14,287.70, 21,431.55 and 12,878.30

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Solution

The fourth proportional to 14,287.70, 21,431.55 and 12,878.30 is: 19,317.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    14,287.70 : 21,431.55 = 12,878.30 : x
  2. Step 2: Convert to fraction form
    14,287.70/21,431.55 = 12,878.30/x
  3. Step 3: Cross multiply
    14,287.70x = 21,431.55 × 12,878.30
  4. Step 4: Simplify right side
    14,287.70x = 276,001,930.37
  5. Step 5: Solve for x
    x = 276,001,930.37/14,287.70
  6. Step 6: Final answer
    x = 19,317.45

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.